Does the subnet calculator send data to the server?

No. IPv4 CIDR calculations run locally in the browser.

Does it support IPv6?

This first version focuses on IPv4 CIDR. IPv6 subnet utilities are deferred.

CIDR notation combines an IP address with a prefix length, such as 192.168.1.0/24.

Developer Utility

Subnet Calculator

Calculate IPv4 CIDR network details locally in your browser. The input is not sent to a MyIPScan server.

Calculate IPv4 CIDR

Enter an IPv4 CIDR block to calculate network details.

What the results mean

The calculator shows the network address, broadcast address, mask, usable range, and total address count for IPv4 CIDR blocks. For /31 and /32 networks, usable-host interpretation can differ by use case.

How to use this tool

Enter an IPv4 CIDR block.
Review the network and usable range.
Use IP tools if you also need public IP, ASN, or geolocation context.

FAQ

Can I calculate private networks?

Yes. This local calculator can calculate any valid IPv4 CIDR math, including private ranges.

Does it check live routing?

No. It performs math only and does not check whether an address is reachable.

Why is /32 a single host?

A /32 contains exactly one IPv4 address.

Developer utilities

What this checks

Local helper output for troubleshooting. These utilities do not scan private systems or certify security.

Limits

What this cannot check

It cannot prove security, inspect live networks, or replace a formal review.

Read results

How to use the output

Treat results as review signals for this browser/session or public target. Re-test after one change, then use Safe Copy or notes that avoid raw identifiers.